6688887 has 8 divisors (see below), whose sum is σ = 9026304. Its totient is φ = 4405368.

The previous prime is 6688859. The next prime is 6688907. The reversal of 6688887 is 7888866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6688887 - 2⁸ = 6688631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6688807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13183 + ... + 13680.

It is an arithmetic number, because the mean of its divisors is an integer number (1128288).

Almost surely, 2^6688887 is an apocalyptic number.

6688887 is a deficient number, since it is larger than the sum of its proper divisors (2337417).

6688887 is a wasteful number, since it uses less digits than its factorization.

6688887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26949.

The product of its digits is 1032192, while the sum is 51.

The square root of 6688887 is about 2586.2882669958. The cubic root of 6688887 is about 188.4160752328.

The spelling of 6688887 in words is "six million, six hundred eighty-eight thousand, eight hundred eighty-seven".